What does it mean to “never lose your cargo as it relates to the Underground Railroad?

fugitive slaves

The term Underground Railroad referred to the entire system, which consisted of many routes called lines. The free individuals who helped runaway slaves travel toward freedom were called conductors, and the fugitive slaves were referred to as cargo.

500 books can be produced by one man and a printing press within 5 months, while a copyist can only produce one in the same amount of time

north east because it has more forest